Substrate and photoelectric display device

ABSTRACT

A substrate and a photoelectric display device comprising the substrate are provided. The substrate comprises a display region ( 11 ) and seal material disposed in a periphery thereof. The substrate further comprises a trapping buffer region ( 13 ) which is disposed between the display region ( 11 ) and the seal material and receives photoelectric display media. By providing the trapping buffer region, impact on the seal material by the excessive photoelectric display media can be mitigated or eliminated when the photoelectric display device is subjected to an external force or is flexed. The life time of the seal material is prolonged. A leakage of the photoelectric display media is avoided.

TECHNICAL FIELD

Embodiments of the present disclosure relate to a substrate and aphotoelectric display device.

BACKGROUND

A photoelectric display device such as a liquid crystal display device,an OLED display device or an electronic paper and etc., has a structuretypically comprising an upper substrate and a lower substrate which arearranged opposite to each other, photoelectric display media disposedbetween the upper and lower substrates, and seal material for sealingthe photoelectric display media therein. As the liquid crystal displaytechnology is the most commonly used display technology at present, theliquid crystal display technology is exemplified. That is to say, aliquid crystal display device comprises therein an upper substrate and alower substrate which are arranged opposite to each other, liquidcrystals disposed between the upper and lower substrates, and sealmaterial for sealing the liquid crystals therein. Since liquid crystalis a substance state between liquid state and crystal state, it hasproperties of liquid and of crystal concurrently, such as liquidity.When a panel of the liquid crystal display device is subjected to anexternal force, excessive liquid crystals will collide with seal agentof the liquid crystal cell. Especially for a flexible liquid crystaldisplay panel, since a flexible liquid crystal display device may beflexed during use, a flow of internal liquid crystals becomes morefrequent, and the impact on the seal agent of the liquid crystal cell isgenerated more frequently by the flow which shortens the life time ofthe liquid crystal display device.

To sum up, when a panel of a photoelectric display device produced byconventional photoelectric display technology is subjected to anexternal force, photoelectric media collide with the seal agent forseveral times, which shortens the life time of the seal agent and causesthe life time of the photoelectric display device to be shortened.

SUMMARY

At least one embodiment of the present disclosure provides a substrateand a photoelectric display device. By means of a photoelectric displaymedium trapping buffer region disposed between a display region and sealmaterial, an impact on the seal material by the plethoric photoelectricdisplay media can be reduced or eliminated when the photoelectricdisplay device is flexed due to an external force. The life time of theseal material is prolonged and leakage of the photoelectric displaymedia can be avoided. Therefore, the life time of the wholephotoelectric display device is prolonged.

At least one embodiment of the present disclosure provides a substratefor a display device, which is provided with a photoelectric displaymedium trapping buffer region disposed between a display region and sealmaterial.

By means of the photoelectric display medium trapping buffer regiondisposed between the display region and the seal material of thesubstrate, an effective damping is generated when the photoelectricdisplay device is subjected to a force. When the photoelectric displaydevice is flexed due to an external force, an impact on the sealmaterial by the plethoric photoelectric display media can be reduced oreliminated. The life time of the seal material is prolonged and leakageof the photoelectric display media can be avoided. Therefore, the lifetime of the whole photoelectric display device is prolonged.

In one embodiment according to the present disclosure, the trappingbuffer region on the substrate comprises a groove.

In one embodiment according to the present disclosure, the trappingbuffer region on the substrate comprises a plurality of sets of grooves,each of which comprises at least one groove. The at least one groove isarranged between the display region and the seal material in a gradientmanner in terms of its dimension. The larger the dimension is, thefarther the distance to the display region is.

In one embodiment according to the present disclosure, the dimensioncomprises a volume of the groove, an opening area of the groove, anopening depth of the groove or an opening width of the groove.

In one embodiment according to the present disclosure, the grooveshaving different areas in the groove set are arranged between thedisplay region and the seal material in a gradient manner, and whereinthe larger the opening area of the groove is, the farther the distanceto the display region is.

By means of the arrangement in a gradient manner of the grooves in theset, impact on the seal agent by the photoelectric display media in thephotoelectric display device is mitigated and thereby ensuring thedamping effect on the seal agent.

In one embodiment according to the present disclosure, the substratefurther comprises a spacer post disposed in the groove.

In one embodiment according to the present disclosure, the groovecomprises a patterned groove formed by a combination of a plurality ofgrooves.

In one embodiment according to the present disclosure, the substratefurther comprises a first spacer post disposed in a recessed region ofthe patterned groove and a second spacer post disposed in a non-recessedregion of the patterned groove.

In one embodiment according to the present disclosure, the groove is agrid-like groove.

In one embodiment according to the present disclosure, the substratefurther comprises a first spacer post disposed on the grid of thegrid-like groove and a second spacer post disposed in the grid ofgrid-like groove.

Through a grid-like design of groove, a stable storage of thephotoelectric display media after the damping can be achieved. Differentspacer posts are designed by means of the gird-like groove, and thus auniform thickness of the photoelectric display medium cell can beachieved.

In one embodiment according to the present disclosure, the substratefurther comprises a protrusion positioned in periphery of the groove.

By means of the protrusion positioned in periphery of the groove, impacton the seal material by the photoelectric display media is partiallymitigated.

In one embodiment according to the present disclosure, the spacer postis disposed on the same substrate as the groove or is disposed on asecond substrate which is oppositely disposed.

In one embodiment according to the present disclosure, the protrusion ispositioned in the same substrate as the groove or is disposed on asecond substrate which is oppositely disposed.

In one embodiment according to the present disclosure, the groove isdisposed on a black matrix or a metallic protection layer.

At least one embodiment of the present disclosure provides aphotoelectric display device comprising the substrate as describedabove.

By means of the photoelectric display device comprising the substrate asdescribed above, an effective damping is generated when the panel of thephotoelectric display device is subjected to a force. Impact on the sealmaterial by the plethoric photoelectric display media, when thephotoelectric display device is pressed or is flexed, can be mitigatedor eliminated. The life time of the seal material is prolonged. Leakageof the photoelectric display media can be avoided. Therefore, the lifetime of the whole photoelectric display device is prolonged.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clearly illustrate the technical solutions of theembodiments of the disclosure, the drawings of the embodiments will bebriefly described in the following; it is obvious that the drawingsdescribed below are only related to some embodiments of the disclosureand thus are not limitative of the disclosure.

FIG. 1 is an illustrative structural view of a substrate according to anembodiment of the present disclosure;

FIG. 2 is an illustrative structural view of a substrate provided with aspacer post according to an embodiment of the present disclosure;

FIG. 3 is an illustrative structural view of a substrate provided withgrooves arranged in a gradient distribution according to an embodimentof the present disclosure;

FIG. 4 is an illustrative structural view of a substrate provided withgrooves arranged in a grid manner according to an embodiment of thepresent disclosure;

FIG. 5 is an illustrative structural view of a substrate provided with aplurality of spacer posts according to an embodiment of the presentdisclosure; and

FIG. 6 is an illustrative structural view of a substrate provided withprotrusions and grooves according to an embodiment of the presentdisclosure.

DETAILED DESCRIPTION

In order to make objects, technical details and advantages of theembodiments of the disclosure apparent, the technical solutions of theembodiment will be described in a clearly and fully understandable wayin connection with the drawings related to the embodiments of thedisclosure. It is obvious that the described embodiments are just a partbut not all of the embodiments of the disclosure. Based on the describedembodiments herein, those skilled in the art can obtain otherembodiment(s), without any inventive work, which should be within thescope of the disclosure.

At least one embodiment of the present disclosure provides a substratefor a display device, wherein a photoelectric display medium trappingbuffer region is disposed between a display region and seal material.

By providing a photoelectric display medium trapping buffer regionbetween the display region and the seal material, impact on the sealmaterial by the photoelectric display media when the photoelectricdisplay device is subjected to an external force can be mitigated. Whenthe photoelectric display device is subjected to an external force or isflexed, the photoelectric display media are pressed and thus flowtowards the seal material disposed at the outer side. The photoelectricdisplay trapping buffer region can receive a portion or all of thephotoelectric display media which are pressed and flow out of thedisplay region, so that impact on the seal material by the photoelectricdisplay media can be mitigated or eliminated when the photoelectricdisplay device is pressed or is flexed.

For example, the seal material comprises seal agent and thephotoelectric display medium comprises liquid crystal.

For example, the trapping buffer region on the substrate comprises agroove.

For example, the trapping buffer region comprises a plurality of grooveswhich are evenly distributed between the display region and the sealmaterial.

For example, the trapping buffer region on the substrate comprises aplurality of groove sets, wherein each groove set comprises at least onegroove, the groove in the groove set is arranged between the displayregion and the seal material in a gradient manner in terms of itsdimension.

For example, the dimension of the groove comprises a volume of thegroove, an opening area of the groove, an opening depth of the groove oran opening width of the groove. The volume of the groove is a capacityof the groove, i.e., the amount of liquid crystal which can be damped bythe groove when the substrate is a substrate on the liquid crystaldisplay.

For example, the grooves having different areas in the groove set arearranged in a gradient manner between the display region and the sealmaterial, wherein the larger the opening area of the groove is, thefarther the distance to the display region is.

By means of the gradient arrangement of the grooves in the set, impacton the seal agent by the photoelectric display media in thephotoelectric display device is mitigated and thereby ensuring thedamping effect for the seal agent.

Each of the grooves comprises at least one spacer post, wherein thespacer post has a cross section of square or of circular. The crosssection of the spacer post is not limited to the shape described in theembodiments of the present disclosure.

The substrate further comprises a spacer post disposed in the groove.

The groove set comprises a patterned groove formed by a combination of aplurality of grooves.

The substrate further comprises a first spacer post disposed in arecessed region of the patterned groove and a second spacer postdisposed in a non-recessed region of the patterned groove. That is tosay, the first spacer post is disposed in the patterned groove, and thesecond spacer post is disposed between the patterned groove and anadjacent groove which means that the second spacer post is positioned onthe patterned groove.

The patterned groove comprises a grid-like groove or a groove made of anirregular opening.

When the patterned groove comprises a grid-like groove, the substratefurther comprises a first spacer post disposed on the grid of thepatterned groove and a second spacer post disposed in the grid of thepatterned groove. For grid-like grooves having different depths, thefirst spacer post and the second spacer post are formed by a grey scaleexposure process.

For example, the spacer post is disposed on the same substrate as thegroove or on a second substrate which is oppositely arranged.

For example, the same substrate as the groove is a color filtersubstrate and the second substrate is an array substrate.

For example, the substrate further comprises a protrusion disposed in aperiphery of the groove.

For example, the substrate further comprises a protrusion which ispositioned in front of the groove or is positioned behind the groove,wherein the term “in front of the groove” refers to a place closer tothe display region than the groove, and the term “behind the groove”refers to a place farther to the display region than the groove.

The protrusion can be made of an over coating layer (OC layer), or theprotrusion can be made of at least one layer of Red, Green, Blue (RGB)layers, or can be made of an OC layer and at least one layer of the RGBlayers.

By means of the protrusion, impact on the seal agent by thephotoelectric display media in the photoelectric display device ispartially mitigated and thus the life time of the seal agent isprolonged.

The protrusion is disposed on the same substrate as the groove or isdisposed on an opposite substrate which is opposite to the substrate inwhich the groove is positioned.

The groove is disposed on a black matrix or a metallic protection layer.For example, if the substrate is a color filter substrate, the groove isdisposed on a black matrix. Alternatively, if the substrate is an arraysubstrate, the groove is disposed on a metallic protection layer.

For example, the metallic protection layer is a passivation layer or aninsulation layer.

For example, the photoelectric display device can be a liquid crystaldisplay device.

At least one embodiment of the present disclosure provides aphotoelectric display medium display device comprising the substrate asdescribed above.

Hereinafter, the substrate according to the embodiments of the presentdisclosure is further described with reference to the drawings.

Referring to FIG. 1, when grooves are disposed on a color filtersubstrate, grooves 13 are evenly distributed on a black matrix 12 on aperiphery of a display region 11 of the color filter substrate. Thenumber of the grooves 13, the depth of the grooves 13 and the shape ofthe grooves 13 can all be set as required. When the grooves are disposedon an array substrate, the grooves are disposed on a metallic protectionlayer.

The grooves formed on the black matrix or the metallic protection layerare configured to serve an effective damping function for the seal agentof the liquid crystal cell and prevent excessive liquid crystals fromimpacting the seal agent of the liquid crystal cell when the liquidcrystal panel is subjected to a force. Thus, the life time of the panelis increased.

Referring to FIG. 2 which is a modification on the basis of FIG. 1, aspacer post 21 is disposed in the groove 13, thereby ensuring an eventhickness of the liquid crystal cell and a uniform distribution inthickness of the liquid crystal cell.

The groove 13 on the black matrix 12 is modified on the basis of FIG. 2,and a groove set is provided. Each groove set comprises a plurality ofgrooves. The grooves in each groove set have different shapes so that adamping effect for the seal agent of the liquid crystal cell can beensured. Since there are numerous variations in groove combination, thepresent disclosure cannot enumerate all the possibilities of the groovecombination. A detailed illustration is given below for a variation ofgradient groove combination.

Referring to FIG. 3, according to an opening area of each set of grooves13, the grooves 13 in each set are in sequence arranged on the blackmatrix 12 in a gradient manner. The larger the opening area of thegroove is, the farther the distance to the display region is.

Similarly, on the basis of FIG. 2, the grooves 13 on the black matrix 12are designed to be in a grid manner, so as to form grid-like grooves 41,thereby ensuring that the liquid crystals can be stably stored in thegrid of grooves after the damping. Further, different depths of groovescan be obtained by a grey scale exposure process and thus a primaryspacer post 42 and a secondary spacer post 43 are formed. The primaryspacer post 42 can be disposed on the grid, while the secondary spacerpost 43 can be disposed within the grid. The primary spacer post beingdisposed on the grid means that the primary spacer post is disposed on anon-recessed region between the grooves. The secondary spacer post 43being disposed within the grid means that the secondary spacer post isdisposed on a recessed region of the groove. FIG. 4 illustrates anarrangement manner of gird-like grooves 41, primary spacer posts 42 andsecondary spacer posts 43, but the present disclosure is not limited tothis arrangement manner.

Since the spacer post can have numerous shapes in cross section, such asa cross section of square and a cross section of circle, a detailedillustration will not be elaborated. Moreover, there can be a pluralityof spacer posts in one groove. On the basis of FIG. 3, a spacer post 51having a cross section of square can be added and two spacer posts canbe added in a part of grooves, and thus an arrangement as illustrated inFIG. 5 can be obtained.

In order to achieve a certain damping impact of the liquid crystals onthe seal agent of the liquid crystal cell, a protrusion 61 and a groovecan be provided simultaneously, and the protrusion 61 can be positionedon the periphery of the groove. For example, the protrusion 61 can bepositioned in front or the back of the groove. The term “front of thegroove” refers to a place closer to the display region than the grooveand the term “back of the groove” refers to a place farther to thedisplay region than the groove. Referring to FIG. 6, the color filtersubstrate provided by the embodiments of the present disclosurecomprises a groove 13 and a protrusion 61 positioned in front of thegroove. The protrusion 61 can be made of an over coating layer (OClayer) or can be made of at least one layer of an RGB filter, or can bemade of an OC layer and at least one layer of the RGB filter layers.

The present disclosure provides a substrate and a photoelectric displaydevice having a photoelectric display medium trapping buffer region forreducing the impact on the seal material. When the photoelectric displaydevice is subjected to an external force or is flexed, the photoelectricdisplay media are pressed and thus flow towards the seal material at theouter side. Therefore, a trapping buffer region can be disposed betweenthe display region and the seal material and receives a partial or allof the whole photoelectric display media which is pressed and flows outof the display region, so that the impact on the trapping buffer regionby the photoelectric display media can be mitigated or eliminated whenthe photoelectric display device is flexed. As such, the life time ofthe seal material is prolonged, and a leakage of the photoelectricdisplay media can be avoided and thus the life time of the entirephotoelectric display device is prolonged. An uniform thickness of thephotoelectric display medium cell is ensured by adding spacer posts inthe grooves and thereby ensuring a consistency in the thickness of thephotoelectric display medium cell. By combining protrusions and grooves,the damping effect on the seal material by the photoelectric displaymedia in the photoelectric display device is ensured.

The foregoing are merely exemplary embodiments of the disclosure, butare not used to limit the protection scope of the disclosure. Theprotection scope of the disclosure shall be defined by the attachedclaims.

The present disclosure claims priority of Chinese Patent Application No.201520005467.5 filed on Jan. 4, 2015, the disclosure of which is herebyentirely incorporated by reference.

1. A substrate for a display device, comprising a display region andseal material disposed in a periphery thereof, the substrate furthercomprising a trapping buffer region which is disposed between thedisplay region and the seal material and receives photoelectric displaymedia.
 2. The substrate according to claim 1, wherein the trappingbuffer region comprises a groove.
 3. The substrate according to claim 1,wherein the trapping buffer region comprises a plurality of groove sets,each groove set comprises at least one groove, the at least one grooveis arranged between the display region and the seal material in agradient manner in terms of its dimension, wherein the larger thedimension is, the farther the distance to the display region is.
 4. Thesubstrate according to claim 3, wherein the dimension can be a volume ofthe groove, an opening area of the groove, an opening depth of thegroove, or an opening width of the groove.
 5. The substrate according toclaim 1, wherein the substrate further comprises a spacer post disposedin the trapping buffer region.
 6. The substrate according to claim 1,wherein the trapping buffer region comprises a plurality of grooves andthe plurality of grooves are combined into a patterned groove.
 7. Thesubstrate according to claim 6, further comprising a first spacer postdisposed in a recessed region of the patterned groove and a secondspacer post disposed on a non-recessed region of the patterned groove.8. The substrate according to claim 2, wherein the substrate furthercomprises a protrusion disposed in a periphery of the groove.
 9. Thesubstrate according to claim 5, wherein the spacer post is disposed onthe same substrate as the groove or is disposed on an opposite substratewhich is opposite to the substrate on which the groove is disposed. 10.The substrate according to claim 8, wherein the protrusion is disposedon the same substrate as the groove or is disposed on an oppositesubstrate which is opposite to the substrate on which the groove isdisposed.
 11. The substrate according to claim 2, wherein the groove isdisposed on a black matrix or a metallic protection layer.
 12. Thesubstrate according to claim 8, wherein the protrusion is made of anover coating layer, or is made of at least one layer of a color filter,or is made of an over coating layer and at least one layer of a colorfilter.
 13. A photoelectric display device, comprising the substrateaccording to claim
 1. 14. The substrate according to claim 2, whereinthe substrate further comprises a spacer post disposed in the trappingbuffer region.
 15. The substrate according to claim 3, wherein thesubstrate further comprises a spacer post disposed in the trappingbuffer region.
 16. The substrate according to claim 2, wherein thetrapping buffer region comprises a plurality of grooves and theplurality of grooves are combined into a patterned groove.
 17. Thesubstrate according to claim 3, wherein the trapping buffer regioncomprises a plurality of grooves and the plurality of grooves arecombined into a patterned groove.
 18. The substrate according to claim3, wherein the substrate further comprises a protrusion disposed in aperiphery of the groove.
 19. The substrate according to claim 7, whereinthe spacer post is disposed on the same substrate as the groove or isdisposed on an opposite substrate which is opposite to the substrate onwhich the groove is disposed.
 20. The substrate according to claim 3,wherein the groove is disposed on a black matrix or a metallicprotection layer.